Combined refrigerator and ice-cream freezer



March 25 1924.

P. L. BLISS COMBINED REFRIGERATOR AND ICE CREAM FREEZER Filed Jan. 27.1920 I i I 5 5 Patented Mar. 25, 1924.

name

roam L. BLISS, or sex rnmcrsco, oamroam COMBINED REFRIGERATOR ANDICE-CREAM Applicationfiled January 27, 1920. Serial No. 354,455.

To allwhom it may concern:

Be it known that L Pon'rnn L. Bmss, a citizen of the United States ofAmerica, and a resident of San Francisco, .county of 5 San Francisco,and State of California,

have invented certain new and useful Imrovements in CombinedRefrigerators and ce-Cream Freezers, of which the following is a fulland clear specification.

The object of this invention is to provide a simple, compact,specially-insulated, portable combined refrigerator and cream freezer,especially adapted for use in automobiles, yachts, etc.; and theinvention v consists in certain novel features of constructionhereinafter described and claimed.

In the drawin Fig. 1 is a vertical sectional view of my apparatus;.

Fig. 2 is a horizontal sectional view taken on a line just under thecover; Fig. 3 1s a perspective view of the two removable foodreceptacles.

Referrin to the drawings annexed by drical casing whose vertical walland whose bottom wall are insulated, i. e., packed with a continuous bodb of insulating material. The cover a is a so packed with a similarmaterial; Any suitable insulating material may be employedfb'ut I preferthe following special insulation: A mixture composed of 40% to 65% ofdiatomaceous earth,combined with 5% to 10% amorphous carbon (charcoal),5% to 10% silicon dioxide (fine sand), 2% to 3% sodium chloride (commonsalt), 10% to 15% aluminum silicate (clay), and 5% to 10%calciumsulphate (gypsum), thereby roducing a low-cost earthy .mixture, ligt-and friable, which has exceptional qualities for the prevention ofheat penetration, and the retaining of the frozen atmosphere caused bythe ice and salt which is laced in thecasing.

ntrally within the casing is afiixed a cylindrical metal-wallice-receptacle d, the wall being not provided with insulating material,so that it shall transmit the necessary low temperature throughout therefrigreference-c aracters, a designates a cyl1nerator by direct frostaction through said metal wall. In this way, the s ace around theice-receptacle is maintaine' at a very low temperature, and thiscircular air-space virtually forms an insulating body for theice-receptacle. Set in the ice-receptacle is an icecreani freezer ewhich may be detachably anchored by any suitable means. I

prefer the type -of ice cream freezer and anchoring device illustratedin my co ending application Serial No. 354,456, file -January 27, 1920.It will be observed, therefore, that the ice-receptacle d not only formsthe ice-tub orbucket for the ice cream freezer, but also forms thecooling medium for the annular space around theice-receptacle, theice-receptacle being un rovided with insulating material so thateat-extraction from said circular space will-be direct and eificient. v

The annular space around the ice-recepta- 7o cle is divided by atransverse partition of metalplates f into two compartments. In one ofthese compartments, I fasten on the bottom of the refrigerator a seriesof rin s or flanges g for the reception of bottles 0 liquid, to hold thebottles in osition and prevent them being knocked a out. The other halfof the space is filled with a pair of segmental metal receptacles kwhose inner concave surfaces are provided with openso ings arrangeddirectly adjacent to the metal wall of the receptacle d, so that adirect refrigerating effect upon the interior of the receptacles h'willbe assured. Each of the receptacles may be divided into an upper andlower compartment by means of i a horizontal partition 3', or they maybe divided in any other suitable manner. The shape of each of thereceptacles h ensures the'mbeing held in proper position, against theice-receptacle, while being transported on an automobile or otherwise.

The nature and scope of the invention havingbgicen thus indicated andits preferred em diment having been specifically dees scribed, what isclaimed as new is: In a portable refrigerator and ice cream freezer, aninsulated casing, a smaller metal aeev gno Wa1liee-receptaele anchoredcentrall therevided to cover the casing and thus enclose 10 in tothereby form an annular artic e-holdthe ice-receptacle and the freezer.

ing space around the ice-receptacle within In testimony whereof Ihereunto aflix my the insulated casing, and a metal fo'od-reoepsignatme.5 tacle sha ed to fit said annular space hav ing a si e adjacent themetal wall of the ice-receptacle provided with an opening, an Witnesses:ice cream freezerbeingwholly enclosed with- E. P. SCHMIDT, in saidice-receptacle, and a cover being prov GEO. L. STEWART.

PORTER L. BLISS.

